I wrote a few custom components which automate the formatting of Grasshopper geometry into a simulation-ready model that can be read directly by EnergyPlus. The colorful visualizations show a simple box structure going through an hourly analysis on a specified design day. The analysis results are streamed back into Grasshopper after the energy analysis is run
There is much potential here (and work to be done before I can put this into a full release!)... I would also like to consult with the experts first before I release this as a plug-in. I am not an MEP expert, after all...